Prucalopride Effects on Subjects With Chronic Non-cancer Pain Suffering From Opioid Induced Constipation

Inclusion criteria to be assessed at screening: 1. Male or non-pregnant, non-breast-feeding female outpatient ≥18 years. 2. Has chronic pain of any aetiology (except cancer pain) requiring daily maintenance treatment with opioids;has been on stable daily opioid dose during at least the previous 2 weeks; and is expected to remain on stable daily dose of opioids for at least 15 weeks after Visit 1. 3. Subject is suffering from OIC (i.e. secondary to chronic opioid use). 4. Subject agrees to stop his/her laxative treatment and is willing to use rescue medication. Main exclusion criteria to be assessed at screening: 1. Constipation is thought to be drug-induced (except for opioids) 2. Disallowed medication is being used 3. Subject was on chronic therapy for chronic constipation prior to start of opioid therapy 4. Subject is suffering from secondary causes of chronic constipation.